Spinal mediation of motor learning and memory in the rat fetus

Developmental Psychobiology
Scott R Robinson

Abstract

Fetal rats can alter patterns of interlimb coordination after experience with a yoke that links two legs together. Yoke training results in a pronounced increase in conjugate limb movements (CLM). To determine whether yoke motor learning is mediated by spinal cord circuitry, fetal subjects at embryonic Day 20 (E20) received yoke training after mid-thoracic spinal cord transection or sham surgery. Both spinal and sham-treated fetuses exhibited an increase in CLM during training. In a second experiment, fetuses received initial yoke training, then were transected or sham treated before a 2nd training. Spinal and sham fetuses that were yoked during both training sessions exhibited a more rapid rise in CLM than those yoked only in the later session. These findings indicate that motor learning in fetal rats can be supported by spinal cord circuitry alone, and that savings implies a form of motor memory localized in the spinal cord.

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Citations

Mar 6, 2015·Developmental Psychobiology·Michele R BrumleyHillary E Swann
Mar 27, 2015·Developmental Psychobiology·Andrew A Sharp
Nov 13, 2018·Perspectives on Behavior Science·Michele R BrumleyAimee L Bozeman
Sep 27, 2019·Infant Behavior & Development·Tiffany S DohertyMichele R Brumley

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